package cn.edu.scau.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;

/**
 * 过滤器，用于解决跨域问题
 * 
 * @author cxywan
 *
 */
public class Crossdomain implements Filter {

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
			throws IOException, ServletException {

		// 强制类型转换成HttpServletResponse
		HttpServletResponse response = (HttpServletResponse) arg1;
		// 解决跨域问题
		response.addHeader("Access-Control-Allow-Origin", "*");
		// 传递到下一个过滤器
		arg2.doFilter(arg0, arg1);

	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}
